ACTA AGRICULTURAE BOREALI-SINICA ›› 2015, Vol. 30 ›› Issue (6): 1-7. doi: 10.7668/hbnxb.2015.06.001

Special Issue: Rice

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QTL Mapping for Seedling Traits Related to Low Nitrogen Tolerance in Rice

ZHAO Chun-fang, ZHAO Ling, ZHANG Ya-dong, CHEN Tao, ZHAO Qing-yong, ZHU Zhen, ZHOU Li-hui, YAO Shu, WANG Cai-lin   

  1. Institute of Food Crops, Jiangsu Academy of Agricultural Sciences, Jiangsu High Quality Rice Research and Development Center, Nanjing Branch of Chinese National Center for Rice Improvement, Nanjing 210014, China
  • Received:2015-09-26 Published:2015-12-28

Abstract: Genetic analysis of low nitrogen related traits has important significance for the study of nitrogen uptake and use efficiency and the breeding of novel varieties with low nitrogen tolerance in rice.In this study,a set of chromosome segment substitution lines (CSSLs) developed from two sequenced rice cultivars:the indica cultivar 9311 as recipient and the japonica cultivar Nipponbare as donor were used to detect for QTLs of rice seedling traits under low nitrogen stress.44 QTLs including 28 QTLs under two N levels and 16 QTLs of their relative traits were mapped.Two QTL hotspots gathered with multiple QTLs under different N levels and the relative traits were found.By searching the predicted genes,the two regions were found to contain several N metabolism genes.Therefore,genes related to N absorption and utilization probably control the expression of these QTLs.This result will be useful in breeding rice varieties with low N tolerance by molecular assisted marker.

Key words: Oryza sativa L., Low nitrogen stress, Root elongation, Root dry weight, QTL

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Cite this article

ZHAO Chun-fang, ZHAO Ling, ZHANG Ya-dong, CHEN Tao, ZHAO Qing-yong, ZHU Zhen, ZHOU Li-hui, YAO Shu, WANG Cai-lin. QTL Mapping for Seedling Traits Related to Low Nitrogen Tolerance in Rice[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2015, 30(6): 1-7. doi: 10.7668/hbnxb.2015.06.001.

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